Presentation of Elisabeth Gérard during the ALATNET training course on Data Assimilation in Gourdon, 11-22 June 2001.

Contents :

• 1. Influence of satellite data in NWP
  • TEMP, SATOB, SSM/I, ATOVS
  • ARPEGE grid
  • Illustration of the OSEs
  • Short range in Northern Hemisphere
  • Medium range
• Principle of remote sensing
  • Active remote sensing
  • Satellite picture
  • Radio occultation geometry
  • Passive remote sensing
  • Solar Backscatter Ultraviolet Spectral Radiometer
• Information content
  • Radiative transfer equation
  • Information content
• Problems due to complex H
  • Bias correction & contamination
  • Use of preprocessed ATOVS data at Météo-France
• Compression of the data with future instruments
  • DRM method
  • SVD method
  • Iterative method
  • Jacobian method
  • Illustration for IASI
  • IASI on Metop
  • Remote sounding from IASI
  • Midlatitudes - T
  • Accuracy / No. of channels
  • Vert. resolution / No. of channels
  • Channel selection - Midlatitudes
  • Statistics on 518 SODA profiles